Before fucking about, please discharge the tube. There's a suction cup with two metal contacts touching the tube.

• Get a screw driver and a pair of alligator clips
• Attach the conductive part of the screw driver to the alligator clips and the other side of it to GND
• DO NOT TOUCH THE METAL PART OF THE SCREW DRIVER
• Use the tip to short the thing that's behind a suction cup on the tube (There should be a popping noise)
• Repeat to be safe
• Use the screw driver and touch all of the components on the back of the board (To discharge capacitors.

Inside the TV there is this one chip or similar. Look up on The Internets to find out. The chip has a marking.